BHT-206L4-MM-1
5-00-00
Page 6 Rev. 18 7 JUN 2013 Export Classification C, ECCN EAR99
5-6. INSPECTION AND OVERHAUL
TOLERANCE
DO NOT APPLY THESE TOLERANCES
TO PARTS WITH A LIMITED
AIRWORTHINESS LIFE (CHAPTER 4).
The Bell Helicopter Textron approved tolerance for
scheduled inspections, special inspections, interim
inspections, and overhaul intervals, unless otherwise
stated, is 10% or up to a maximum of 300 hours
operating time/6 months calendar time, whichever is
less. The tolerances are established for maintenance
scheduling convenience only.
Scheduled inspections, special inspections, interim
inspections, or overhaul intervals required beyond the
stated tolerances must be approved by Product
Support Engineering.
The following is only applicable for those
operators whose governing aviation
authority requires to specifically approve
the inspection and overhaul tolerance.
If approval of the inspection and overhaul tolerance is
required by the applicable governing aviation authority,
this is the responsibility of the owner/operator.
Refer to the Rolls-Royce 250-C30 Series Operation
and Maintenance Manual (14W2) for inspection and
overhaul tolerances.
The following provide examples of when hourly,
calendar, or hourly/calendar inspection tolerances
have been applied:
Hourly Example (10% or up to a maximum of 300 hours, whichever is less):
300-HOUR
INSPECTION
DUE AT:
MAXIMUM ALLOWED
TOLERANCE
INSPECTION CARRIED
OUT AT:
NEXT 300-HOUR
INSPECTION
DUE AT:
3400 Hours 10% of 300 hours = 30 hours 3430 Hours
(10% tolerance applied)
3730 Hours
3730 Hours 10% of 300 hours = 30 hours 3750 Hours
(within 10% tolerance)
4050 Hours
4050 Hours 10% of 300 hours = 30 hours 4050 Hours
(tolerance not applied)
4350 Hours
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